Linear vs logarithmic scales. 1  Human hearing is better measured on a logarithmic scale than a linear scale. 2  On a linear scale, a change between two values is perceived on the basis of the difference between the values.  On a logarithmic scale, a change between two values is perceived on the basis of the ratio of the two values.
Antimony has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores stibnite (Sb 2 S 3) and valentinite (Sb 2 O 3). Nicolas Lemery, lÃ©mery A french, chemist was the first person to scientifically study antimony and its. compounds
What are Elements and Alloys? Metals can be elements or alloys. Elements are the basic building blocks of chemistry. Examples of elements: Oxygen, nitrogen, hydrogen, iron (Fe), copper (Cu) and niobium (Nb). Lead (Pb) is an element that was traditionally popular as an ingredient in casting alloys (and some other alloys) because it makes some metals softer, less brittle and/or helps them melt at lower temperatures.